Multiple wire drawing machine



April 30, 1935. w. NACKEN 1,999,942

MULTIPLE WIRE DRAWING MACHINE Filed March 26, 1934 3 Sheets-Sheet 1 April 30, 1935. w. NACKEN MULTIPLE WIRE DRAWING MACHINE Filed March 26, 1934 3 Sheets-Sheet 2 April 30, 1935. w. NACKEN 1,999,942

MULTIP LE WIRE DRAWING MACHINE Filed larch 26, 1934 3 Sheets-Sheet 3 10 34 L 34 fll 'atented Apr. 30, 1935 UNITED STATES PATENT OFFICE Walther Nacken, Gruna, near Chemnitz,

Germany Application March 26,

14 Claims.

This invention relates to a multiple wire drawing machine, the drawing rolls of which are carried by vertical shafts passing through the bottom of the receptacle containing the drawing solution and rotated by a stationary gear disposed in the machine frame.

To prevent the drawing solution from entering the gear, the container of the drawing solution, according to the invention, is arranged as a separate unit above the wall of the machine frame covering the gear on top so as to leave a space between the bottom of the container and the top wall of the machine frame. From the bottom of the container tubular connecting members through which the driving shafts for the drawing rolls pass in the usual way extend upwardly.

It has been found'advantageous to subdivide the container of thedrawing solution in such a way that if one or several rolls must run dry during the threading of a new wire and the exchange of a drawing stone, the surface of the liquid will be,lowered only in the particular part of the container concerned.

The drawing solution can be supplied or dischargedin various ways, e. g., by plungers, auxiliary containers capable of being raised and lowered and communicating with the main container by means of ,flexible tubes or the like, or by pumps or other suitable means.

By way of example, the invention is illustrated in the accompanying drawings, in which Figure l is a vertical cross section of the wire drawing machine;

Fig. 2, a front view thereof, partly in vertical section;

Fig. 3, a plan of Fig. 2;

Fig. 4, a cross section of the lowermost portion of the drawing rolls;

Fig. 5; a plan of a modified construction of the wire drawing machine;

' Referring to the drawings, the machine frame consists of a gear box I provided with the feet 2.

The box I is covered on top by the wall 3 and 1934, Serial No. 717,470

Germany March 28, 1933 contains in known manner the gears 4, 5 for turning several vertical shafts 6 to the top ends of which the bell-shaped drawing rolls I are secured.

The container 8 for the drawing solution forms a separate part and is preferably stamped from a single piece of sheet of an acid-proof metal alloy in such a way that its bottom l2 at the points where the shafts 6 of the drawing rolls 1 have to pass is provided with upwardly extending tubular members 9 which project beyond the surface of the drawing solution III to be poured into the container 8. The solution I0 is thus prevented from reaching the shafts 6, so that the latter may come up from below through the bottom I! of the container 8 without requiring any packing. This arrangement affords the advantage that the bearing of the shafts 6 needs no attendance.

The container 8 rests on the upwardly extending connecting members I I provided on the upper side of the gear box I. Between the upper wall 3 of the box I and the bottom H of the container 8 a free space is left to prevent the drawing solution from gradually, in the course of time, finding a way to reach the inside of the gear box I. To exclude this possibility absolutely, the top wall 3 of the box I slopes like a roof-towards both sides and is also covered with an acid-proof protective plate consisting preferably of lead.

To prevent particles of the drawing fluid succeeding, for any reasons, in passing beyond the top edge of the members 9 and reaching the shafts 6 from flowing along the latter into the box I and damaging particularly the bearings of the shafts 6, a splash ring it is attached to each shaft 6 in the free space between the wall 3 and the bottom I! of the container 8, the free edge of the ring being bent down, so that, even when at rest, it can be depended on for letting drawing fluid drip off and onto the protective plate I 3 without giving it a chance to flow on the underside of the ring I. to one of the shafts 6. When the machine is in operation, any particles of drawing solution reaching the splash; ring M will be thrown off by centrifugal force. In this way, a leaky spot in the container for the drawing solution can be easily detected and repaired before serious damage is done.

Furthermore, to prevent a too rapid upward flow of the drawing solution, which may temporarily take place for any reasons, in the space between the wall of the drawing rolls and the upwardly extending members of the container of the drawing solution, so that it overflows the top edge of these members, it is advisable to depress the treadle l2! concerned so as to raise provide, according to Fig. 4, approximately radiaily extending grooves 20 at the lower edge of the drawing roll I and to fit the container 8 opposite the grooved edge of the drawing roll and at a slight distance from the latter with a boss 2| so as to leave only a narrow gap through which the drawing solution can flow towards the inside of the drawing roll. The grooves 20 in the lower edge of the drawing roll I act during rotation of the latter like a centrifugal pump, so that the drawing liquid is in a way thrown out of the inner space of the drawing roll and has no opportunity of reaching the top edge of the connecting members 9.

The construction described affords the advantage that the drawing rolls become easily accessible from above whereby attendance and the drawing in of a new wire are greatly facilitated. The drawing stones may be reliably placed in holders which are open on top, and thus lie freely exposed in their casings. Above all, however, the gear is arranged in the machine frame so as to be safe from vibrations, which is of special importance, as larger drawing machines sometimes require a driving power exceeding hp, so that the motor and the shafts must be heavy and strong. a

Each shaft 6 may carry either a single or multiple drawing roll 1. While on its way from one drawing roll to the next the wire always passes through a drawing stone 24.

The container 8 is subdivided into several parts by the'partitions l5 of equal or different height, two drawing rolls 1 being provided in each compartment of the container 8 in the construction shown.

Each compartment possesses a downwardly extending pocket 16 in which a plunger I! can be moved up and down. By raising the plunger H the surface of drawing solution in the compartment concerned can be lowered. For normal operation, the plunger I1 is lowered in the pocket It and thus the level of the liquid raised to such an extent that the wire portions wound around the drawing rolls I are completely surrounded by the drawing 'liquid. To facilitate the raising and lowering of the plungers I], each of the latter has secured to its top end a. hook-like carrying .rod l8 whose lower end is articulated to a double arm lever l9 arranged on the machine frame at' I20. The front end of the lever l9 carries the treadle l2l. During operation of the machine the plungers I! are lowered and the readle |2l is raised. To lower the surface of the liquid in any compartment all that is necessary is to the appurtenant plunger l1.

Each partition I 5 of'the container 8 is provided with fine perforations for the wire to be drawn to enable the latter to be guided from the drawing roll of one compartment to that of the next compartment without causing the level of the liquid in one compartment to be influenced by the lowering of the surface of the liquid in another. It is further possible if desired to strip or! the liquid adhering to the wire on passing from one compartment to another.

During the threading of a new wire and when the drawing rolls. arranged in a compartment are covered with the wire, the level of the liquid in the compartment concerned is always raised so as to eliminated all dangers which could be expected if the rolls in the compartment were permitted to run dry. In this way, the wires will not cut into the rolls nor will the stones or dies be heated, and the much-feared forerunning or slipping of the wires, which otherwise will be unavoidable owing to the great adhesive power they exert upon dry rolls and which may cause confusion, will not take place.

In order to maintain the level of the liquid in all compartments of the container 8 at a certain height during operation of the machine, the partitions l5 may serve as overflows and enable the liquid constantly supplied by the pump in a more or less powerful stream to one of the compartments to flow from one compartment to another and finally into the reservoir whence it is passed again to the pump for continual circulation. When a new wire is threaded the pump can be stopped.

The plunger construction described can be dispensed with if a reservoir 25, as shown in Fig. 6, is provided for the drawing solution and arranged in lower position than the container 8 before the machine frame I. x

The drawing solution conveyed by the pump 26 in the conduit 21 is preferably introduced into the compartment 8' where the threading of the wire begins. From this compartment 8' the solution then flows over the top of the partitions l5 into the adjacent compartments, each of which is provided near its bottom with a drain cock 28. In the conduit 21 a multiple-way cook 28 with a by-pass is disposed for the purpose of returning during threading of a wire the drawing solution delivered by the pump to the reservoir while allowing a small portion thereof continued entrance to the container 8 so as to keep the drawing rolls 1 in those compartments where the wire has been properly threaded under the surface of the drawing solution. According to Fig. 7, the multiple-way cook 29 may be constructed so as to allow of itself after reversal the desired small amount of liquid to enter the container 8 through a narrow auxiliary bore 38.

If complete new threading is required, all drain cocks 28 are opened and.al1 compartments of the container 8 emptied. After the wire has then been drawn in through the drawing stones 24 in the first compartment 8', the drain cock '28 of this first compartment is closed and, by

reversal of the multiple-way cook 29, the drawing solution delivered by the pump 28 guided intothe. first compartment. When this has been filled, the cook 29 is reversed again and the wire threaded in the second compartment which is then also filled with solution. In this way, the' wire is successively drawn in in the various compartments of the container 8. It is important to keep the compartment where drawing in takes place free from solution and the compartments where threading is completed filled therewith. When the wire has been threaded through the drawing stones of the last compartment and the latter has been filled with drawing solution, the

machine may be allowed to run full speed. The

the drawing solution directly from the pump 26 to each compartment by branch conduits. In this case it is advisable to guide the drawing solution to those parts of the casing in which the drawing stones are located in order to have the latter well surrounded by the freshly supplied solution before it mixes with the liquid still contained in the compartment. Arrangements may be such that the freshly supplied drawing liquid does not only cool the drawing stones, but, above all, removes the slime which is deposited when the wire enters the opening of the drawing stones. For this purpose, the freshly entering drawing liquid, by suitably shaped outlets of its conduit, is guided directly against the inlet openings of the drawing stones.

A construction for supplying liquid in the manner described is shown in Figs. 8 to .11. The stones 24 are inserted in pocket-like parts 34 of a bracket 35, so that the drawing orifice 36 of the drawing stones 24 lies in front of corresponding recess 31 of the pockets 34 and the wire can be drawn through the stones 24 and then through the recesses 31 of the pockets 34 while the stones 24 hug corresponding projections 38 in the pockets 34.

In order to throw the drawing solution against the openings 36 of the'stones 24 a head piece 39 is disposed between the pockets 34. This head piece 39 is provided with openings 40 in such a way that drawing solution introduced into the head piece 39 will be passed through the openings 40 against the openings 36 of the drawing stones 24. The head piece 39 is connected with the supply pipe 4| which is oscillatorily articulated to the supply piping 43 secured in the container 8'., so that the head piece 39 together with the piping 4| can be raised to exchange or examine the drawing stones.

Instead of passing the drawing liquid to the drawing stones by means of a movable head piece 39 it would be possible to place fixed conduits in the bracket 35 so as to have the outlets thereof directed against the drawing stones 24.

I claim:

l. A multiple wire drawing machine, comprising a frame having a fluid shedding wall, gears supported in the frame below said wall, a plurality of vertical shafts extending through the wall and rotated by said gears, a container, means for supplying drawing solution to said container, members for supporting said container at a distance above said wall, tubular members formed in the bottom of said container and extending above the liquid therein for receiving said shafts passing therethrough, and drawing rollers secured to the top of said shafts within said container.

2. A multiple wire drawing machine, comprising a frame having a fluid shedding wall gears supported in the frame below the wall, a plurality of vertical shafts extending through the wall and rotated by said gears, a container, means for supplying drawing solution to said container, members for supporting said container at a distance above said wall, tubular members formed in the bottom of said container and extending abofe the liquid therein for receiving said shafts projecting therethrough, drawing rolls secured to the top of said shafts within said container, and a splash ring attached to each shaft in the space between the wall and the bottom of said container for carrying away particles of drawing solution from said shafts.

3. A multiple wire drawing machine, comprising a frame having a fluid shedding wall, gears supported in the frame below the wall, a plurality of vertical shafts extending through the wall and rotated by said gears, a container, means for supplying drawing solution to said container, members for supporting said container at a distance above said wall, tubular members formed in the bottom of said container and extending above the liquid therein for receiving said shafts projecting therethrough, drawing rolls secured to the top of said shafts within said container, and a splash ring attached to each shaft in the space between the said wall and the bottom of said container for carrying away particles of drawing solution from saidshaft, said wall sloping towards both sides for removing particles of solution coming out of said container.

4. A multiple wire drawing machine, compris ing a frame having a roof-like fluid shedding wall surfaced with acid resisting material, gears supported in the frame below the wall, a. plurality of vertical shafts extending through the wall and rotated by said gears, a container, means for supplying drawing solution to said container, members for supporting said container at a distance above said wall, tubular members formed in the bottom of said container and extending above the liquid therein for receiving said shafts projecting therethrough, drawing rolls secured to the top of said shafts within said container, and a splash ring attached to each shaft in the space between the said wall and the bottom of said container for carrying away particles of drawing solution from said shaft.

1 5. A machine according to claim 1, in which partitions divide the container into compartments and serve as overflows, and means areprovided for lowering the level of drawing solution only in selected compartments.

6. A machine according to claim 1, in which partitions divide the container into compartments and serve as overflows, and means are provided for lowering the level of drawing solution only inselected compartments consisting of a plunger in each compartment, said plungers being capable of up and down motion independently of one another.

7. A machine according to claim 1, in which the drawing rolls are radially grooved on their lower edges, and a boss is provided on the bottom of said container at a short distancefrom said edges to form a narrow gap for the solution flowing inside said rolls.

8. A machine according to claim 1, in which the container is subdivided into compartments for the several drawing rollers and the means for supplying drawing solution to said container and compartments includesa pump ands. conduit, a reservoir for the solution, a drain cock at the bottom of each compartment, a multiple-way cock in said conduit for passing solution delivered by said pump to, said container during operation of the machine and for returning the solution to said reservoir during threading and allowing only a small amount thereof to pass into said container.

9. A machine according to claim 1, in which oriflced drawing stones engage the wire on passing from one of the drawing rolls to another, and the means for supplying drawing solution open into those parts of the container where said drawing stones are located.

10. A machine according to claim 1, in which oriflced drawing stones engage the wire on passing from one of the drawing rolls to another, and

the means for supplying drawing solution have outlet openings whereby solution is directed against the orifices of the drawing stones.

11. A wire drawing machine comprising a frame having a fluid shedding wall, a vertical shaft extending through said wall, a container for drawing fluid supported in the frame with its bottom spaced above the fluid shedding wall, an upwardly directed tubular extension on the bottom of the container reaching above the fluid levei therein and through which the shaft extends, and wire drawing devices on the upper end of the shaft.

12. A wire drawing machine comprising a frame having a fluid shedding wall, a vertical shaft extending through said wall, a container for drawing fluid supported in the frame with its bottom spaced above the fluid shedding wall, an upwardly directed tubular extension on the bottom of the container reaching above the fluid level therein and through which the shaft extends, supporting and driving means for the shaft arranged below the fluid shedding surface of the wall, and wire drawing devices on the upper end of the shaft.

13. A wire drawing machine comprising a frame having a fluid shedding wall, a bearing in said wall, a vertical shaft extending through said bearing, a splash ring attached to the shaft above the bearing, a container for drawing fluid supported in the frame with its bottom spaced above the fluid shedding wail, anv upwardly directed tubular extension on the bottom of the container reaching above the fluid level therein and through which the shaft extends, and wire drawing devices on the upper end of the shaft.

14. A wire drawing machine comprising a frame having a fluid shedding wall, a vertical shaft extending through said wall, a container for draw ing fluid supported in the frame with its bottom spaced above the fluid shedding wall, an upwardly directed tubular extension on the bottom of the container reaching above the fluid level therein and through which the shaft extends, wire drawing devices on the upper end of the shaft, and means in the container and wire drawing devices for constricting the flow of liquid from the container to the inside of the wire drawing devices.

WALTHER. F: ACE'ZEN. 

